High-quality material The cordless impact screwdriver bit holder is made of high-quality chrome vanadium steel with particularly high hardness and good abrasion resistance. Polished finish and corrosion resistant to make it more durable. Easy to use The socket kit is easy to install and disassemble, and does not fall off easily when in use. The nut socket set is very occlusive, firm and flexible. Each socket has an obvious size marking, you can quickly find the socket you need. 1/4 Hex Shank This hex socket socket is suitable for installation in hex tools such as pneumatic screwdriver , electric screwdriver, air drill, electric drill, gun drill, hand screwdriver and more. 7 piece size domains. Socket adapter (inches): 3/16, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16; 7 Drive Nuts (Metric): 5mm, 5.5mm, 6mm, 7mm, 8mm, 10mm, 12mm. Different sizes of hex drill bits are enough to meet your daily needs. Multi-use Universal 1/4 hex shanks accommodate quick changes and are securely clamped in standard chucks that fit all drills, screwdrivers and guns. Widely used in household items, auto parts, carpentry, professional machinery repairs and much more. Specifications: Item Name: Hex Chuck. Contents: 14 hex sockets Features: The inner hex socket is made of high quality material, sturdy and durable.< /p> Comes with a working case which is easier to carry and store. Widely used in DIY, auto parts, woodworking, professional machine repair. Suitable for installation in the hex tools such as air screwdriver, electric screwdriver, air drill, electric drill, electric drill, electric drill, gun drill, hand screwdriver and more.